Fix TCL version detection with recent gawk

build/autotools/includes/libtcl.m4

@@ -368,7 +368,7 @@ AC_DEFUN([EGG_TCL_CHECK_VERSION],
 
       AC_MSG_CHECKING([for Tcl version])
       AC_CACHE_VAL(egg_cv_var_tcl_version, [
-        egg_cv_var_tcl_version=`grep TCL_VERSION $TCLINC/$TCLINCFN | $HEAD_1 | $AWK '{gsub(/\"/, "", [$]3); print [$]3}'`
+        egg_cv_var_tcl_version=`grep TCL_VERSION $TCLINC/$TCLINCFN | $HEAD_1 | $AWK '{gsub(/"/, "", [$]3); print [$]3}'`
       ])
 
       if test "x$egg_cv_var_tcl_version" != x; then
@@ -384,7 +384,7 @@ AC_DEFUN([EGG_TCL_CHECK_VERSION],
       fi
       AC_MSG_CHECKING([for Tcl patch level])
       AC_CACHE_VAL(egg_cv_var_tcl_patch_level, [
-        eval "egg_cv_var_tcl_patch_level=`grep TCL_PATCH_LEVEL $TCLINC/$TCLINCFN | $HEAD_1 | $AWK '{gsub(/\"/, "", [$]3); print [$]3}'`"
+        eval "egg_cv_var_tcl_patch_level=`grep TCL_PATCH_LEVEL $TCLINC/$TCLINCFN | $HEAD_1 | $AWK '{gsub(/"/, "", [$]3); print [$]3}'`"
       ])
 
       if test "x$egg_cv_var_tcl_patch_level" != x; then

configure

@@ -6690,7 +6690,7 @@ $as_echo_n "checking for Tcl version... " >&6; }
   $as_echo_n "(cached) " >&6
 else
 
-        egg_cv_var_tcl_version=`grep TCL_VERSION $TCLINC/$TCLINCFN | $HEAD_1 | $AWK '{gsub(/\"/, "", $3); print $3}'`
+        egg_cv_var_tcl_version=`grep TCL_VERSION $TCLINC/$TCLINCFN | $HEAD_1 | $AWK '{gsub(/"/, "", $3); print $3}'`
 
 fi
 
@@ -6714,7 +6714,7 @@ $as_echo_n "checking for Tcl patch level... " >&6; }
   $as_echo_n "(cached) " >&6
 else
 
-        eval "egg_cv_var_tcl_patch_level=`grep TCL_PATCH_LEVEL $TCLINC/$TCLINCFN | $HEAD_1 | $AWK '{gsub(/\"/, "", $3); print $3}'`"
+        eval "egg_cv_var_tcl_patch_level=`grep TCL_PATCH_LEVEL $TCLINC/$TCLINCFN | $HEAD_1 | $AWK '{gsub(/"/, "", $3); print $3}'`"
 
 fi